EP2087212A2 - Ensemble de couverture de culasse de moteur à séparateur d'huile intégré - Google Patents

Ensemble de couverture de culasse de moteur à séparateur d'huile intégré

Info

Publication number
EP2087212A2
EP2087212A2 EP07854823A EP07854823A EP2087212A2 EP 2087212 A2 EP2087212 A2 EP 2087212A2 EP 07854823 A EP07854823 A EP 07854823A EP 07854823 A EP07854823 A EP 07854823A EP 2087212 A2 EP2087212 A2 EP 2087212A2
Authority
EP
European Patent Office
Prior art keywords
head cover
cover assembly
cap
set forth
oil separator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07854823A
Other languages
German (de)
English (en)
Other versions
EP2087212A4 (fr
Inventor
Teng-Hua Shieh
Naveen Rajan
Wei Liu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Engineering and Manufacturing North America Inc
Original Assignee
Toyota Motor Engineering and Manufacturing North America Inc
Toyota Engineering and Manufacturing North America Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Engineering and Manufacturing North America Inc, Toyota Engineering and Manufacturing North America Inc filed Critical Toyota Motor Engineering and Manufacturing North America Inc
Publication of EP2087212A2 publication Critical patent/EP2087212A2/fr
Publication of EP2087212A4 publication Critical patent/EP2087212A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M13/0405—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in covering members apertures, e.g. caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0461—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a labyrinth

Definitions

  • the invention relates to an engine head cover for an internal combustion engine. More particularly, the invention relates to an engine head cover having an integrated oil separator for separating oil from crankcase gases during operation of the engine.
  • An internal combustion engine typically includes a combustion chamber, where a fuel air mixture is burned to cause movement of a set of reciprocating pistons, and a crankcase, which contains the crankshaft driven by the pistons. During operation, it is normal for the engine to experience "blow-by," wherein combustion gases leak past the piston-cylinder gap from the combustion chamber and into the crankcase. These blow-by or crankcase gases contain moisture, acids and other undesired by-products of the combustion process.
  • An engine typically includes a Positive Crankcase Ventilation (PCV) system for removing harmful gases from the engine and prevents those gases from being expelled into the atmosphere. The PCV system does this by using manifold vacuum to draw vapors from Hie crankcase into the intake manifold.
  • PCV Positive Crankcase Ventilation
  • Vapor is then carried with the fuel/air mixture into an intake manifold of the combustion chambers where it is burned.
  • the flow or circulation within the system is controlled by the PCV valve, which acts as both a crankcase ventilation system and as a pollution control device.
  • crankcase gases it is normal for crankcase gases to also include a very fine oil mist.
  • the oil mist is carried by the PCV system to the manifold.
  • the oil mist is then burned in the combustion chamber along with the fuel/air mixture. This results in an increase in oil consumption.
  • a known method of removing oil from the crankcase gases is to use an oil separator.
  • the crankcase gases flow through the oil separator. Localized high pressure areas in the oil separator promote separation of oil from the gases.
  • the oil is re-introduced back to a sump via a drain device. The sump generally holds excess oil in the system.
  • a head cover assembly for covering a crankcase of an internal combustion engine.
  • the head cover assembly includes a head cover and an oil separator.
  • the head cover has opposite outer and inner surfaces.
  • the oil separator separates oil from crankcase gases passing therethrough.
  • the oil separator has a housing disposed along an inner surface of the head cover.
  • the housing has at least one side wall integral with the head cover, which together with the head cover define an interior space of the oil separator.
  • Figure 1 is a bottom view of a head cover assembly having an integral oil separator according to one embodiment of the invention
  • Figure 2 is an enlarged bottom view of a portion of the head cover assembly shown in Figure 1 ;
  • Figure 3 is an exploded perspective bottom view of the head cover assembly of Figure 1;
  • Figure 4 is a bottom view of a head cover assembly according to a second embodiment of the invention.
  • Figure 5 is an enlarged bottom view of a portion of the head cover assembly shown in Figure 4;
  • Figure 6 is a top perspective view of the head cover assembly of Figure 4;
  • Figure 7 is an enlarged exploded top perspective view of a portion of the head cover assembly of Figure 4;
  • Figure 8 is an enlarged exploded perspective view of a portion of the head cover assembly according to a third embodiment of the invention.
  • Figure 9 is an enlarged perspective view of a portion of the head cover assembly of Figure 8 showing a side of an oil separator cap with a tab for securing the cap to a head cover;
  • Figure 10 is a cross sectional view of the head cover assembly of Figure 8 illustrating the slot for lockingly receiving the tab for securing the cap to the head cover.
  • a head cover assembly for enclosing a cranlccase of an internal combustion engine is generally indicated at 10.
  • the head cover assembly 10 includes a head cover 12 having opposite outer 14 and inner 16 surfaces.
  • the head cover assembly 10 also includes an oil separator 20 for removing oil from crankcase gases in the engine.
  • the oil separator 20 includes a housing 30 disposed along the inner surface 16 of the head cover 12.
  • the housing 30 has a plurality of side walls 22, 24, 26, 28 integrally formed with the head cover 12. At least one of the side walls 28 extends along the inner surface 16 of the head cover 12, while the remaining side walls 22, 24, 26 extend outwardly from the inner surface 16 of the head cover 12.
  • all of the side walls of the housing extend outwardly from the inner surface of the head cover.
  • the head cover may be formed from steel, aluminum or any material or combination of materials known by those skilled in the art, which are suitable for use in the heat and the environment associated with the engine and which allows integral formation of at least portions of the oil separator housing with the head cover.
  • a portion of the head cover 12 extends between the side walls 22, 24, 26, 28 to form an interior space.
  • a plate 40 cooperates with the side walls 22, 24, 26, 28 to enclose the interior space of the oil separator 20.
  • the head cover 12 has at least one threaded bore 29 for securing the plate 40 to the side walls 22, 24, 26, 28 using a bolt.
  • a gasket may be disposed between the side walls 22, 24, 26, 28 and the plate 40 to prevent gases from leaking from the interior space of the housing 30.
  • the housing may have a generally cylindrical side wall that extends from the inner surface of the head cover instead of the straight side walls of the illustrated embodiment.
  • the plate would then have a generally circular shape to cooperate with the generally cylindrical shape of the side wall, [0020]
  • the housing 30 of the oil separator 20 includes an inlet and an outlet.
  • a plurality of guide walls 43 extend from the head cover 12 toward the plate 40 to define a path 39 that directs crankcase gases through the housing 30.
  • the path 39 is shaped to promote separation of oil from crankcase gases as the gases flow through the path 39 between the inlet and outlet. The separated oil is collected in the housing 30 and re-introduced to the oil sump (not shown) for re-use in the engine.
  • FIG. 4-7 A second embodiment of the head cover assembly 110 is shown in Figures 4-7, wherein like parts are indicated by numerals offset by 100.
  • the housing 130 is formed by a cap 41, a cover plate 45 and a cylindrical side wall 50, which together define the interior space of the oil separator 120.
  • the cylindrical side wall 50 is formed integrally with the head cover 112 and defines a recess for receiving the cap therein.
  • the cap 41 includes an annular portion 40 with threads 42 for engaging mating threads 44 on the head cover 112. [0022] During assembly, the cap 41 is inserted into the recess formed by the cylindrical side wall 50.
  • the cap 41 is then turned about its longitudinal axis to cause threading engagement between the threads 42 on the cap 41 and mating threads 44 formed in the cylindrical side wall 50, thereby securing the cap 41 to the head cover 112.
  • the cap 41 is fully inserted when it contacts a locating surface 52 formed head cover 112 adjacent a bottom end of the cylindrical side wall 50.
  • the cover plate 45 is disposed between the cap 41 and the head cover 112.
  • the plurality of guide walls 143 extend from the cover plate 45 to define the flow path for crankcase gases passing through the oil separator 120.
  • a third embodiment of the head cover assembly 210 are shown in Figures 8-11.
  • the threads from the second embodiment are replaced with a tab and slot arrangement, wherein a tab 60 extends outwardly from the annular portion 240 of the cap 241 and a guide slot 62 is formed in the cylindrical side wall 250.
  • the guide slot 62 extends in a generally longitudinal direction along the cylindrical side wall 250.
  • a key slot 68 extends generally orthogonally from an end 66 of the guide slot 62.
  • the cap 241 is fully inserted when it contacts the locating surface 252 at the bottom of the recess. The cap 241 is then turned so that the tab 60 slides into the key slot 68, thereby securing the oil separator 220 to the head cover 212.
  • the tab and slot arrangement may be reversed, wherein the tab extends from the head cover and the slot is formed in the cap.
  • the guide walls are arranged in the form of a labyrinth, which promotes the separation of oil from the crankcase gases as the gases flow therealong.
  • the oil separator may be a cyclone type oil separator, wherein the guide wall is a coil that defines a spiral-shape flow path that extends between the inlet and the outlet of the housing. It should be appreciated by those having ordinary skill in the art that other types of oil separators may be packaged within the housing.
  • the oil separator may incorporate more than one type of oil separating arrangement within the housing, such as a combination between labyrinth and cyclone type oil separating arrangements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un ensemble de couverture de culasse pour couvrir un carter de moteur d'un moteur à combustion interne comportant un couvercle de culasse et un séparateur d'huile solidaire. Le séparateur d'huile inclut un logement définissant un trajet d'écoulement qui sépare l'huile des gaz du carter de moteur le traversant. Au moins une partie du logement est formée solidairement le long d'une surface interne du couvercle de culasse.
EP07854823A 2006-12-01 2007-11-29 Ensemble de couverture de culasse de moteur à séparateur d'huile intégré Withdrawn EP2087212A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/565,872 US20080127953A1 (en) 2006-12-01 2006-12-01 Engine Head Cover Assembly Having An Integrated Oil Separator
PCT/US2007/085861 WO2008070514A2 (fr) 2006-12-01 2007-11-29 Ensemble de couverture de culasse de moteur à séparateur d'huile intégré

Publications (2)

Publication Number Publication Date
EP2087212A2 true EP2087212A2 (fr) 2009-08-12
EP2087212A4 EP2087212A4 (fr) 2009-11-11

Family

ID=39474312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07854823A Withdrawn EP2087212A4 (fr) 2006-12-01 2007-11-29 Ensemble de couverture de culasse de moteur à séparateur d'huile intégré

Country Status (4)

Country Link
US (1) US20080127953A1 (fr)
EP (1) EP2087212A4 (fr)
JP (2) JP2010511827A (fr)
WO (1) WO2008070514A2 (fr)

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KR101014532B1 (ko) * 2008-07-25 2011-02-14 기아자동차주식회사 블로우바이 가스의 오일 분리장치
DE102008037104B4 (de) * 2008-08-08 2020-12-03 Deutz Ag Kurbelgehäuseentlüftungsanschluss an einer Brennkraftmaschine
US8082907B2 (en) * 2009-03-31 2011-12-27 Mann+Hummel Gmbh Air/oil separating PCV apparatus
CN102200071A (zh) * 2011-05-14 2011-09-28 重庆长安汽车股份有限公司 一种具有回油结构的发动机缸罩通气盖板
US9221001B2 (en) 2011-10-11 2015-12-29 Toyota Boshoku Kabushiki Kaisha Oil mist separator
US20140245977A1 (en) * 2011-10-20 2014-09-04 Donaldson Company, Inc. Air/oil separator assemblies, components; and, methods
US8887705B2 (en) * 2012-05-23 2014-11-18 Honda Motor Co., Ltd. Head cover baffle system for improving oil mist separation
USD931763S1 (en) * 2020-02-25 2021-09-28 Ciro Corporation Pair of motorcycle engine cylinder head covers
CN113356964A (zh) * 2021-07-20 2021-09-07 安徽江淮汽车集团股份有限公司 一种呼吸系统

Family Cites Families (19)

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JPS5464844U (fr) * 1977-10-18 1979-05-08
JPS6030406Y2 (ja) * 1979-12-05 1985-09-12 ダイハツ工業株式会社 内燃機関におけるブロ−バイガスの抽出装置
JPS57115914U (fr) * 1981-01-09 1982-07-17
JPS60143122U (ja) * 1984-03-05 1985-09-21 アイシン精機株式会社 オイルセパレ−タ
JPS60192821A (ja) * 1984-03-15 1985-10-01 Honda Motor Co Ltd 内燃機関のクランクケ−スベンチレ−シヨン装置
JPS6449618U (fr) * 1987-09-22 1989-03-28
JPH02114714U (fr) * 1989-02-28 1990-09-13
JPH0360194A (ja) * 1989-07-28 1991-03-15 Seiko Epson Corp 蓋構造
US5069192A (en) * 1989-10-24 1991-12-03 Nissan Motor Company, Ltd. Internal combustion engine with crankcase ventilation system
JP3077477B2 (ja) * 1993-10-30 2000-08-14 スズキ株式会社 ヘッドカバーの構造
JP2001280112A (ja) * 2000-03-31 2001-10-10 Honda Motor Co Ltd 船外機用エンジンの気液分離室
JP2002104483A (ja) * 2000-09-22 2002-04-10 Calsonic Kansei Corp 注入口キャップ
US6443136B1 (en) * 2000-10-25 2002-09-03 Honda Giken Kogyo Kabushiki Kaisha Breather apparatus for an internal combustion engine
JP3967552B2 (ja) * 2001-02-19 2007-08-29 本田技研工業株式会社 エンジン用気液分離装置
DE10127820A1 (de) * 2001-06-07 2002-12-12 Bosch Gmbh Robert Ölabscheidevorrichtung für Kurbelgehäusegase einer Verbrennungskraftmaschine
KR100874537B1 (ko) * 2001-09-18 2008-12-16 얀마 가부시키가이샤 엔진의 브리더장치
US6453892B1 (en) * 2001-10-11 2002-09-24 Dana Corporation Constrained layer damped steel baffle
JP4344579B2 (ja) * 2003-10-15 2009-10-14 株式会社マーレ フィルターシステムズ シリンダヘッドカバーのオイルセパレータ
US7461643B2 (en) * 2006-10-06 2008-12-09 Harley-Davidson Motor Company Group, Inc. Breather assembly for an internal combustion engine

Also Published As

Publication number Publication date
WO2008070514A2 (fr) 2008-06-12
US20080127953A1 (en) 2008-06-05
JP6096684B2 (ja) 2017-03-15
JP2010511827A (ja) 2010-04-15
EP2087212A4 (fr) 2009-11-11
JP2014074414A (ja) 2014-04-24
WO2008070514A3 (fr) 2008-12-04

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